I was asked this question by some guys that want to know. I would not,personally ,even think about this, but some do, I suppose'
Are Green Mtn 1" x 30" x 54 cal slow twist,,breeched with L&R patent breech, strong enough to handle 150 grain loads of substitute black powder, with a belted ball/ bullet ?
These fellows hunt bear and other big critters with muzzleloaders.
Whaddaya think?
Thanks, dave F
Hi Dave: my thoughts.
1st off, I expect the reason for the question about 150gr. powder charge is the use of 3, 50gr. compressed plugs of phony bp.
I'm with the other guys. I think it is foolish to attempt. Pressures skyrocket with such loads. A standard HEAVY load for a patched round ball, last stats I saw, developed in the vicinity of
15,000PSI.
One of the reloading companies (Accurate Arms) printed a whack of data years ago, about BP ctg.'s and the pressures THEY generated with standard loads, with what appeared to be
similar loads (70 to 120gr.) only with bullets, not patched round balls.
The 70gr charge developed 22,000psi while the 120gr. load, same bullet, developed 30,000psi.
This alone should make them re-consider their folly. Bulleted loads are hard on nipples and flintlock vents due to burnout. Neither of these were designed for high pressure bulleted charges
yet they last for years with normal charges and round balls due to the GREATLY lowered pressures.
If they don't think a round ball is powerful enough - they have not hunted with one &/or are listening to people who know not of what they are writing/speaking.
Round ball rifles dominated the large dangerous game hunting for over a century, until breech loading guns were invented. Even a .45 or .50 RB rifle will kill moose and elk reliably, if planted in the
right spot.
A .54 is much more than necessary for hunting, killing black bears. On the other hand, to hunt grizzly I would not consider with less than a 20 bore rifle, and preferably with a 16 bore or larger.
Bob-in-the-woods, 10 bore sounds about right.
Samuel Baker (of Africa and India) - "I had a conical mould made for this rifle.............but instead of rendering it more invincible, it entirely destroyed it's efficacy, and brought me into such
scrapes that I at length fave up the conical ball as useless."